28×26＝26×{#blank#}1{#/blank#} 

25×29×4＝{#blank#}2{#/blank#} ×{#blank#}3{#/blank#}×29

25×(9×4)＝(25×{#blank#}4{#/blank#})×{#blank#}5{#/blank#}

125×32×25＝(125×{#blank#}6{#/blank#})×（{#blank#}7{#/blank#}×25)

150×(2＋4)＝{#blank#}8{#/blank#}×{#blank#}9{#/blank#}×{#blank#}10{#/blank#}×{#blank#}11{#/blank#}

①25×99×4

②125×76×8

③354+218+82

④79×44+79×56

⑤276+158+124+142

⑥879-432-68

56×76+24×56         356-138-62+44            8×27×125

280-(167+85)÷9         45×99-55             539÷[(405-363)÷6]